For service and parts needs, visit your dealer. You will receive genuine GM parts and GM-trained and supported service people.
Genuine GM parts have one of these marks:

Vehicle Care
California Proposition 65 WarningDoors
Trunk
WARNING
Exhaust gases can enter the vehicle if it is driven with the liftgate, trunk/hatch
open, or with any objects that pass through the seal between the body and the trunk/hatch
or liftgate. Engine exhaust contains carbon monoxide (CO) which cannot be seen or
smelled. It can cause u ...
Using the Navigation System
Use the NAV button on the faceplate or Home Page to access the navigation map.
Press the NAV button again to change between alternative views of the normal
split and full map views.
The Menu screen button at the bottom right side of the display accesses the Navigation
Menu.
The touch-sens ...
Installation Procedure
Align the body side outer panel reinforcement.
Drill 8 mm (5/16 in) for plug welding along the edges of the body side
outer panel reinforcement as noted from the original panel.
Clean and prepare the attaching surfaces
for welding.
Position the body side outer pa ...